Why is LINQ expression causing two separate queries on the DB?

Question

I have the following LINQ expression:

var rawData = ( from e in _man.Details
where e.Id == "G00"
select e).ToList();

which when I run with Profiler open I can see causes two separate identical queries. What is the reason for this and how can this be prevented?

Answer 1

Can you check what is the value in EventClass column in profiler. It probably is SQL:Batch Starting and SQL:Batch Completing (or something similar). Which does not mean 2 queries, but the start and end of execution of one query.